| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to fast-reacting composition, applied for obtaining low-density solid polyurethane foam. Described is fast-reacting composition, applied for obtaining low-density solid polyurethane foam, obtained by mixing the following components in proper proportion by weight: highly-active complex material:foamer:isocyanate - 100:(8~28):(105~155);with highly-active complex material being obtained by mixing the following components in proper proportion by weight: mixed polyol:foam stabiliser:water:additional ingredient - 100:(0.5~3.5):(1.0~10):(0.5~3.0):(0~5); with foamer being related to mixture of cyclopentane and HFC-365 mfc, or mixture of cyclopentane and HFC-245 fa, or mixture of cyclopentane, HFC-365 mfc and HFC-245 fa; and mixed polyol consisting of polyesterpolyol with hydroxyl number 100-450 mg KOH/g, Mannih's polyol with hydroxyl number 160-750 KOH/g and polyetherpolyol, where polyesterpolyol constitutes 1.0-30 wt % of the total weight of mixed polyol, and Mannih's polyol constitutes 0-50 wt % of the total weight of mixed polyol, and residue represents polyetherpolyol.EFFECT: obtaining solid polyurethane foam of low density with density of formed foam less than 33,0 kg/m.9 cl, 19 ex, 2 tbl, 1 dwg |
